Error on Build

[Dennis Kubes]

Is anybody else seeing this error on the build?

BUILD FAILED
C:\PROGRAMMING\java\eclipse\workspace\hadoop-dev\build.xml:138: 
java.lang.IncompatibleClassChangeError: class 
org.apache.jasper.runtime.JspFragmentHelper has interface 
javax.servlet.jsp.tagext.JspFragment as super class

Total time: 1 second